He won the national high school championship with his teammates including Kenta Hasegawa and Takumi Horiike.
After graduating from the university in 1988, he joined Japan Soccer League side Yamaha Motors (current Júbilo Iwata).
He joined the club in 1992 and re-united with his high school teammates Hasegawa and Horiike.
Oenoki worked as a coach at Shimizu S-Pulse in 2003 and he was the manager of Waseda University between 2004 and 2007.
In July 2014, he became a manager for top team as Afshin Ghotbi successor.